Roger Korn on tue 22 dec 98
Gail,
Marc "be da' man", so go with his advice, but I wanted to add that going to
2# gas sure makes life easier. From meter to kiln is 50' at my place, and
would have required 1 1/4" pipe @ 8 WCI (water column inches), but I can
deliver 400,000 BTU/hr through 3/4" pipe at 2# (55 WCI), enabling me to use
(4) MR-750 venturi burners for 300,000 BTU/hr.
Forced air burners work well too, and are more immune to wind caused
blow-out for outdoor kilns, but you really need to use an electric power
relay in series with a BASO shut off if you use forced air, so the gas
shuts off AND STAYS OFF if the power quits.
Anyway, listen to Marc. I've never met the man, but I've met plenty of
people he's helped, and he's been at this longer than I.
Hope this helps,
Roger
McKay Creek Ceramics
Box 436
North Plains, OR 97133
rkorn@europa.com
http://www.europa.com/~rkorn/pottery.html
Gail wrote:
----------------------------Original message----------------------------
Marc -
I called the gas company yesterday, and they told me that I have "six
inches of
water column" and can get up to two pounds more of pressure if I ask for
it.
Would power burners be the way to go? I bought a used kiln from
someone, and th
had some homemade burners with copper supply lines - I didn't think that
was a
great idea, so I pitched 'em. They were power, though. I tried to call
you
yesterday, too, but you weren't in. I ordered a catalog.
We'll talk soon, I'm sure.
-Gail
Marc Ward wrote:
> ----------------------------Original
message----------------------------
> Gail,
>
> One of the unfortunate things my job entails is to be the bearer of
bad
> news.... Many folks build kilns with the burners as an afterthought.
Unless
> your natural gas company can give you a high pressure feed, you're
going to
> have trouble with 4 Venturi's firing this kiln at 150,000 BTU per
burner. Six
> burners would be more like it unless you get huge Venturis. Now, this
brings
> into question your port and flue size. It's all related. If you can
get
> several pounds of pressure to the kiln, you'll be fine. But, if you
can't,
> there are some issues you'll need to deal with. Too many to go into
here. For
> folks out there ready to build a kiln a word of advise; whether you
call us or
> someone else, determine burner requirements and size, gas supply, port
sizes,
> ect. BEFORE you build. Gail, feel free to give us a call to discuss
your
> situation.
>
> Marc Ward
> Ward Burner Systems
> PO Box 333
> Dandridge, TN 37725
> USA
> 423.397.2914 voice
> 423.397.1253 fax
> wardburner@aol.com
Kathi LeSueur on wed 23 dec 98
In a message dated 12/22/98 2:11:02 PM, you wrote:
>Forced air burners work well too, and are more immune to wind caused
>blow-out for outdoor kilns, but you really need to use an electric power
>relay in series with a BASO shut off if you use forced air, so the gas
>shuts off AND STAYS OFF if the power quits.
A good investment for anyone using power burners is a generator. A small
Honda, like a 500 will do. Instead of wiring your relay, put a plug on the end
of it. If you get a power failure you can switch over to the generator and
keep your kiln going.
The system I use has a solenoid valve on the gas line. The solenoid and the
burners are both wired into a relay. If the power goes out the burners shut
down and the gas line closes. It can't be turned on until I manually reset it.
Kathi LeSueur
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